Just got back from doing a light back workout and holy shit do i feel like crap. i went light and my heart was going like crazy and my eyes are blood shot. but this morning when i was doing interval cardio i felt fine. i will be laying off the weights for the next few days and just doing cardio. im on my way to the store to pick up some 800 mg Magnesium/day,800 Potassium/day,1.5g Calcium/day,150mg CoQ-10.